android仿微信聊天界面 語音錄制功能

本例為模仿微信聊天界面UI設計，文字發送以及語言錄制UI。

1先看效果圖：

第一:chat.xml設計

 <?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  android:background="@drawable/chat_bg_default" > 
 
  <!-- 標題欄 --> 
  <RelativeLayout 
    android:id="@+id/rl_layout" 
    android:layout_width="fill_parent" 
    android:layout_height="45dp" 
    android:background="@drawable/title_bar" 
    android:gravity="center_vertical" > 
 
    <Button 
      android:id="@+id/btn_back" 
      android:layout_width="70dp" 
      android:layout_height="wrap_content" 
      android:layout_centerVertical="true" 
      android:background="@drawable/title_btn_back" 
      android:onClick="chat_back" 
      android:text="返回" 
      android:textColor="#fff" 
      android:textSize="14sp" /> 
 
    <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_centerInParent="true" 
      android:text="白富美" 
      android:textColor="#ffffff" 
      android:textSize="20sp" /> 
 
    <ImageButton 
      android:id="@+id/right_btn" 
      android:layout_width="67dp" 
      android:layout_height="wrap_content" 
      android:layout_alignParentRight="true" 
      android:layout_centerVertical="true" 
      android:layout_marginRight="5dp" 
      android:background="@drawable/title_btn_right" 
      android:src="@drawable/mm_title_btn_contact_normal" /> 
  </RelativeLayout> 
 
  <!-- 底部按鈕以及 編輯框 --> 
  <RelativeLayout 
    android:id="@+id/rl_bottom" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_alignParentBottom="true" 
    android:background="@drawable/chat_footer_bg" > 
 
    <ImageView 
      android:id="@+id/ivPopUp" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentLeft="true" 
      android:layout_centerVertical="true" 
      android:layout_marginLeft="10dip" 
      android:src="@drawable/chatting_setmode_msg_btn" /> 
 
    <RelativeLayout 
      android:id="@+id/btn_bottom" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_alignParentRight="true" 
      android:layout_centerVertical="true" 
      android:layout_toRightOf="@+id/ivPopUp" > 
 
      <Button 
        android:id="@+id/btn_send" 
        android:layout_width="60dp" 
        android:layout_height="40dp" 
        android:layout_alignParentRight="true" 
        android:layout_centerVertical="true" 
        android:layout_marginRight="10dp" 
        android:background="@drawable/chat_send_btn" 
        android:text="發送" /> 
 
      <EditText 
        android:id="@+id/et_sendmessage" 
        android:layout_width="fill_parent" 
        android:layout_height="40dp" 
        android:layout_centerVertical="true" 
        android:layout_marginLeft="10dp" 
        android:layout_marginRight="10dp" 
        android:layout_toLeftOf="@id/btn_send" 
        android:background="@drawable/login_edit_normal" 
        android:singleLine="true" 
        android:textSize="18sp" /> 
    </RelativeLayout> 
 
    <TextView 
      android:id="@+id/btn_rcd" 
      android:layout_width="fill_parent" 
      android:layout_height="40dp" 
      android:layout_alignParentRight="true" 
      android:layout_centerVertical="true" 
      android:layout_marginLeft="10dp" 
      android:layout_marginRight="10dp" 
      android:layout_toRightOf="@+id/ivPopUp" 
      android:background="@drawable/chat_send_btn" 
      android:gravity="center" 
      android:text="按住說話" 
      android:visibility="gone" /> 
  </RelativeLayout> 
   
  <!-- 聊天內容 listview --> 
  <ListView 
    android:id="@+id/listview" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_above="@id/rl_bottom" 
    android:layout_below="@id/rl_layout" 
    android:cacheColorHint="#0000" 
    android:divider="@null" 
    android:dividerHeight="5dp" 
    android:scrollbar 
    android:stackFromBottom="true" /> 
   
  <!-- 錄音顯示UI層 --> 
  <LinearLayout 
    android:id="@+id/rcChat_popup" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:gravity="center" 
    android:visibility="gone" > 
 
    <include 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_gravity="center" 
      layout="@layout/voice_rcd_hint_window" /> 
  </LinearLayout> 
 
</RelativeLayout> 

第二：語音錄制類封裝SoundMeter.java

package com.example.voice_rcd; 
 
import java.io.IOException; 
 
import android.media.MediaRecorder; 
import android.os.Environment; 
 
public class SoundMeter { 
  static final private double EMA_FILTER = 0.6; 
 
  private MediaRecorder mRecorder = null; 
  private double mEMA = 0.0; 
 
  public void start(String name) { 
    if (!Environment.getExternalStorageState().equals( 
        android.os.Environment.MEDIA_MOUNTED)) { 
      return; 
    } 
    if (mRecorder == null) { 
      mRecorder = new MediaRecorder(); 
      mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
      mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
      mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
      mRecorder.setOutputFile(android.os.Environment.getExternalStorageDirectory()+"/"+name); 
      try { 
        mRecorder.prepare(); 
        mRecorder.start(); 
         
        mEMA = 0.0; 
      } catch (IllegalStateException e) { 
        System.out.print(e.getMessage()); 
      } catch (IOException e) { 
        System.out.print(e.getMessage()); 
      } 
 
    } 
  } 
 
  public void stop() { 
    if (mRecorder != null) { 
      mRecorder.stop(); 
      mRecorder.release(); 
      mRecorder = null; 
    } 
  } 
 
  public void pause() { 
    if (mRecorder != null) { 
      mRecorder.stop(); 
    } 
  } 
 
  public void start() { 
    if (mRecorder != null) { 
      mRecorder.start(); 
    } 
  } 
 
  public double getAmplitude() { 
    if (mRecorder != null) 
      return (mRecorder.getMaxAmplitude() / 2700.0); 
    else 
      return 0; 
 
  } 
 
  public double getAmplitudeEMA() { 
    double amp = getAmplitude(); 
    mEMA = EMA_FILTER * amp + (1.0 - EMA_FILTER) * mEMA; 
    return mEMA; 
  } 
} 

第三：主界面Activity源碼，沒寫太多解釋，相對比較簡單的自己研究下：

package com.example.voice_rcd; 
 
import java.io.File; 
import java.util.ArrayList; 
import java.util.Calendar; 
import java.util.List; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.os.Environment; 
import android.os.Handler; 
import android.os.SystemClock; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.View.OnTouchListener; 
import android.view.WindowManager; 
import android.view.animation.Animation; 
import android.view.animation.AnimationUtils; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 
import android.widget.ListView; 
import android.widget.RelativeLayout; 
import android.widget.TextView; 
import android.widget.Toast; 
 
public class MainActivity extends Activity implements OnClickListener { 
  /** Called when the activity is first created. */ 
 
  private Button mBtnSend; 
  private TextView mBtnRcd; 
  private Button mBtnBack; 
  private EditText mEditTextContent; 
  private RelativeLayout mBottom; 
  private ListView mListView; 
  private ChatMsgViewAdapter mAdapter; 
  private List<ChatMsgEntity> mDataArrays = new ArrayList<ChatMsgEntity>(); 
  private boolean isShosrt = false; 
  private LinearLayout voice_rcd_hint_loading, voice_rcd_hint_rcding, 
      voice_rcd_hint_tooshort; 
  private ImageView img1, sc_img1; 
  private SoundMeter mSensor; 
  private View rcChat_popup; 
  private LinearLayout del_re; 
  private ImageView chatting_mode_btn, volume; 
  private boolean btn_vocie = false; 
  private int flag = 1; 
  private Handler mHandler = new Handler(); 
  private String voiceName; 
  private long startVoiceT, endVoiceT; 
 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.chat); 
    // 啟動activity時不自動彈出軟鍵盤 
    getWindow().setSoftInputMode( 
        WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN); 
    initView(); 
 
    initData(); 
  } 
 
  public void initView() { 
    mListView = (ListView) findViewById(R.id.listview); 
    mBtnSend = (Button) findViewById(R.id.btn_send); 
    mBtnRcd = (TextView) findViewById(R.id.btn_rcd); 
    mBtnSend.setOnClickListener(this); 
    mBtnBack = (Button) findViewById(R.id.btn_back); 
    mBottom = (RelativeLayout) findViewById(R.id.btn_bottom); 
    mBtnBack.setOnClickListener(this); 
    chatting_mode_btn = (ImageView) this.findViewById(R.id.ivPopUp); 
    volume = (ImageView) this.findViewById(R.id.volume); 
    rcChat_popup = this.findViewById(R.id.rcChat_popup); 
    img1 = (ImageView) this.findViewById(R.id.img1); 
    sc_img1 = (ImageView) this.findViewById(R.id.sc_img1); 
    del_re = (LinearLayout) this.findViewById(R.id.del_re); 
    voice_rcd_hint_rcding = (LinearLayout) this 
        .findViewById(R.id.voice_rcd_hint_rcding); 
    voice_rcd_hint_loading = (LinearLayout) this 
        .findViewById(R.id.voice_rcd_hint_loading); 
    voice_rcd_hint_tooshort = (LinearLayout) this 
        .findViewById(R.id.voice_rcd_hint_tooshort); 
    mSensor = new SoundMeter(); 
    mEditTextContent = (EditText) findViewById(R.id.et_sendmessage); 
     
    //語音文字切換按鈕 
    chatting_mode_btn.setOnClickListener(new OnClickListener() { 
 
      public void onClick(View v) { 
 
        if (btn_vocie) { 
          mBtnRcd.setVisibility(View.GONE); 
          mBottom.setVisibility(View.VISIBLE); 
          btn_vocie = false; 
          chatting_mode_btn 
              .setImageResource(R.drawable.chatting_setmode_msg_btn); 
 
        } else { 
          mBtnRcd.setVisibility(View.VISIBLE); 
          mBottom.setVisibility(View.GONE); 
          chatting_mode_btn 
              .setImageResource(R.drawable.chatting_setmode_voice_btn); 
          btn_vocie = true; 
        } 
      } 
    }); 
    mBtnRcd.setOnTouchListener(new OnTouchListener() { 
       
      public boolean onTouch(View v, MotionEvent event) { 
        //按下語音錄制按鈕時返回false執行父類OnTouch 
        return false; 
      } 
    }); 
  } 
 
  private String[] msgArray = new String[] { "有人就有恩怨","有恩怨就有江湖","人就是江湖","你怎麼退出？ ","生命中充滿了巧合","兩條平行線也會有相交的一天。"}; 
 
  private String[] dataArray = new String[] { "2012-10-31 18:00", 
      "2012-10-31 18:10", "2012-10-31 18:11", "2012-10-31 18:20", 
      "2012-10-31 18:30", "2012-10-31 18:35"}; 
  private final static int COUNT = 6; 
 
  public void initData() { 
    for (int i = 0; i < COUNT; i++) { 
      ChatMsgEntity entity = new ChatMsgEntity(); 
      entity.setDate(dataArray[i]); 
      if (i % 2 == 0) { 
        entity.setName("白富美"); 
        entity.setMsgType(true); 
      } else { 
        entity.setName("高富帥"); 
        entity.setMsgType(false); 
      } 
 
      entity.setText(msgArray[i]); 
      mDataArrays.add(entity); 
    } 
 
    mAdapter = new ChatMsgViewAdapter(this, mDataArrays); 
    mListView.setAdapter(mAdapter); 
 
  } 
 
  public void onClick(View v) { 
    // TODO Auto-generated method stub 
    switch (v.getId()) { 
    case R.id.btn_send: 
      send(); 
      break; 
    case R.id.btn_back: 
      finish(); 
      break; 
    } 
  } 
 
  private void send() { 
    String contString = mEditTextContent.getText().toString(); 
    if (contString.length() > 0) { 
      ChatMsgEntity entity = new ChatMsgEntity(); 
      entity.setDate(getDate()); 
      entity.setName("高富帥"); 
      entity.setMsgType(false); 
      entity.setText(contString); 
 
      mDataArrays.add(entity); 
      mAdapter.notifyDataSetChanged(); 
 
      mEditTextContent.setText(""); 
 
      mListView.setSelection(mListView.getCount() - 1); 
    } 
  } 
 
  private String getDate() { 
    Calendar c = Calendar.getInstance(); 
 
    String year = String.valueOf(c.get(Calendar.YEAR)); 
    String month = String.valueOf(c.get(Calendar.MONTH)); 
    String day = String.valueOf(c.get(Calendar.DAY_OF_MONTH) + 1); 
    String hour = String.valueOf(c.get(Calendar.HOUR_OF_DAY)); 
    String mins = String.valueOf(c.get(Calendar.MINUTE)); 
 
    StringBuffer sbBuffer = new StringBuffer(); 
    sbBuffer.append(year + "-" + month + "-" + day + " " + hour + ":" 
        + mins); 
 
    return sbBuffer.toString(); 
  } 
 
  //按下語音錄制按鈕時 
  @Override 
  public boolean onTouchEvent(MotionEvent event) { 
 
    if (!Environment.getExternalStorageDirectory().exists()) { 
      Toast.makeText(this, "No SDCard", Toast.LENGTH_LONG).show(); 
      return false; 
    } 
 
    if (btn_vocie) { 
      System.out.println("1"); 
      int[] location = new int[2]; 
      mBtnRcd.getLocationInWindow(location); // 獲取在當前窗口內的絕對坐標 
      int btn_rc_Y = location[1]; 
      int btn_rc_X = location[0]; 
      int[] del_location = new int[2]; 
      del_re.getLocationInWindow(del_location); 
      int del_Y = del_location[1]; 
      int del_x = del_location[0]; 
      if (event.getAction() == MotionEvent.ACTION_DOWN && flag == 1) { 
        if (!Environment.getExternalStorageDirectory().exists()) { 
          Toast.makeText(this, "No SDCard", Toast.LENGTH_LONG).show(); 
          return false; 
        } 
        System.out.println("2"); 
        if (event.getY() > btn_rc_Y && event.getX() > btn_rc_X) {//判斷手勢按下的位置是否是語音錄制按鈕的范圍內 
          System.out.println("3"); 
          mBtnRcd.setBackgroundResource(R.drawable.voice_rcd_btn_pressed); 
          rcChat_popup.setVisibility(View.VISIBLE); 
          voice_rcd_hint_loading.setVisibility(View.VISIBLE); 
          voice_rcd_hint_rcding.setVisibility(View.GONE); 
          voice_rcd_hint_tooshort.setVisibility(View.GONE); 
          mHandler.postDelayed(new Runnable() { 
            public void run() { 
              if (!isShosrt) { 
                voice_rcd_hint_loading.setVisibility(View.GONE); 
                voice_rcd_hint_rcding 
                    .setVisibility(View.VISIBLE); 
              } 
            } 
          }, 300); 
          img1.setVisibility(View.VISIBLE); 
          del_re.setVisibility(View.GONE); 
          startVoiceT = SystemClock.currentThreadTimeMillis(); 
          voiceName = startVoiceT + ".amr"; 
          start(voiceName); 
          flag = 2; 
        } 
      } else if (event.getAction() == MotionEvent.ACTION_UP && flag == 2) {//松開手勢時執行錄制完成 
        System.out.println("4"); 
        mBtnRcd.setBackgroundResource(R.drawable.voice_rcd_btn_nor); 
        if (event.getY() >= del_Y 
            && event.getY() <= del_Y + del_re.getHeight() 
            && event.getX() >= del_x 
            && event.getX() <= del_x + del_re.getWidth()) { 
          rcChat_popup.setVisibility(View.GONE); 
          img1.setVisibility(View.VISIBLE); 
          del_re.setVisibility(View.GONE); 
          stop(); 
          flag = 1; 
          File file = new File(android.os.Environment.getExternalStorageDirectory()+"/" 
                  + voiceName); 
          if (file.exists()) { 
            file.delete(); 
          } 
        } else { 
 
          voice_rcd_hint_rcding.setVisibility(View.GONE); 
          stop(); 
          endVoiceT = SystemClock.currentThreadTimeMillis(); 
          flag = 1; 
          int time = (int) ((endVoiceT - startVoiceT) / 1000); 
          if (time < 1) { 
            isShosrt = true; 
            voice_rcd_hint_loading.setVisibility(View.GONE); 
            voice_rcd_hint_rcding.setVisibility(View.GONE); 
            voice_rcd_hint_tooshort.setVisibility(View.VISIBLE); 
            mHandler.postDelayed(new Runnable() { 
              public void run() { 
                voice_rcd_hint_tooshort 
                    .setVisibility(View.GONE); 
                rcChat_popup.setVisibility(View.GONE); 
                isShosrt = false; 
              } 
            }, 500); 
            return false; 
          } 
          ChatMsgEntity entity = new ChatMsgEntity(); 
          entity.setDate(getDate()); 
          entity.setName("高富帥"); 
          entity.setMsgType(false); 
          entity.setTime(time+"\""); 
          entity.setText(voiceName); 
          mDataArrays.add(entity); 
          mAdapter.notifyDataSetChanged(); 
          mListView.setSelection(mListView.getCount() - 1); 
          rcChat_popup.setVisibility(View.GONE); 
 
        } 
      } 
      if (event.getY() < btn_rc_Y) {//手勢按下的位置不在語音錄制按鈕的范圍內 
        System.out.println("5"); 
        Animation mLitteAnimation = AnimationUtils.loadAnimation(this, 
            R.anim.cancel_rc); 
        Animation mBigAnimation = AnimationUtils.loadAnimation(this, 
            R.anim.cancel_rc2); 
        img1.setVisibility(View.GONE); 
        del_re.setVisibility(View.VISIBLE); 
        del_re.setBackgroundResource(R.drawable.voice_rcd_cancel_bg); 
        if (event.getY() >= del_Y 
            && event.getY() <= del_Y + del_re.getHeight() 
            && event.getX() >= del_x 
            && event.getX() <= del_x + del_re.getWidth()) { 
          del_re.setBackgroundResource(R.drawable.voice_rcd_cancel_bg_focused); 
          sc_img1.startAnimation(mLitteAnimation); 
          sc_img1.startAnimation(mBigAnimation); 
        } 
      } else { 
 
        img1.setVisibility(View.VISIBLE); 
        del_re.setVisibility(View.GONE); 
        del_re.setBackgroundResource(0); 
      } 
    } 
    return super.onTouchEvent(event); 
  } 
 
  private static final int POLL_INTERVAL = 300; 
 
  private Runnable mSleepTask = new Runnable() { 
    public void run() { 
      stop(); 
    } 
  }; 
  private Runnable mPollTask = new Runnable() { 
    public void run() { 
      double amp = mSensor.getAmplitude(); 
      updateDisplay(amp); 
      mHandler.postDelayed(mPollTask, POLL_INTERVAL); 
 
    } 
  }; 
 
  private void start(String name) { 
    mSensor.start(name); 
    mHandler.postDelayed(mPollTask, POLL_INTERVAL); 
  } 
 
  private void stop() { 
    mHandler.removeCallbacks(mSleepTask); 
    mHandler.removeCallbacks(mPollTask); 
    mSensor.stop(); 
    volume.setImageResource(R.drawable.amp1); 
  } 
 
  private void updateDisplay(double signalEMA) { 
     
    switch ((int) signalEMA) { 
    case 0: 
    case 1: 
      volume.setImageResource(R.drawable.amp1); 
      break; 
    case 2: 
    case 3: 
      volume.setImageResource(R.drawable.amp2); 
       
      break; 
    case 4: 
    case 5: 
      volume.setImageResource(R.drawable.amp3); 
      break; 
    case 6: 
    case 7: 
      volume.setImageResource(R.drawable.amp4); 
      break; 
    case 8: 
    case 9: 
      volume.setImageResource(R.drawable.amp5); 
      break; 
    case 10: 
    case 11: 
      volume.setImageResource(R.drawable.amp6); 
      break; 
    default: 
      volume.setImageResource(R.drawable.amp7); 
      break; 
    } 
  } 
 
  public void head_xiaohei(View v) { // 標題欄 返回按鈕 
 
  } 
} 

第四：自定義的顯示適配器：

package com.example.voice_rcd; 
 
import java.util.List; 
 
import android.content.Context; 
import android.media.MediaPlayer; 
import android.media.MediaPlayer.OnCompletionListener; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.TextView; 
 
public class ChatMsgViewAdapter extends BaseAdapter { 
 
  public static interface IMsgViewType { 
    int IMVT_COM_MSG = 0; 
    int IMVT_TO_MSG = 1; 
  } 
 
  private static final String TAG = ChatMsgViewAdapter.class.getSimpleName(); 
 
  private List<ChatMsgEntity> coll; 
 
  private Context ctx; 
 
  private LayoutInflater mInflater; 
  private MediaPlayer mMediaPlayer = new MediaPlayer(); 
 
  public ChatMsgViewAdapter(Context context, List<ChatMsgEntity> coll) { 
    ctx = context; 
    this.coll = coll; 
    mInflater = LayoutInflater.from(context); 
  } 
 
  public int getCount() { 
    return coll.size(); 
  } 
 
  public Object getItem(int position) { 
    return coll.get(position); 
  } 
 
  public long getItemId(int position) { 
    return position; 
  } 
 
  public int getItemViewType(int position) { 
    // TODO Auto-generated method stub 
    ChatMsgEntity entity = coll.get(position); 
 
    if (entity.getMsgType()) { 
      return IMsgViewType.IMVT_COM_MSG; 
    } else { 
      return IMsgViewType.IMVT_TO_MSG; 
    } 
 
  } 
 
  public int getViewTypeCount() { 
    // TODO Auto-generated method stub 
    return 2; 
  } 
 
  public View getView(int position, View convertView, ViewGroup parent) { 
 
    final ChatMsgEntity entity = coll.get(position); 
    boolean isComMsg = entity.getMsgType(); 
 
    ViewHolder viewHolder = null; 
    if (convertView == null) { 
      if (isComMsg) { 
        convertView = mInflater.inflate( 
            R.layout.chatting_item_msg_text_left, null); 
      } else { 
        convertView = mInflater.inflate( 
            R.layout.chatting_item_msg_text_right, null); 
      } 
 
      viewHolder = new ViewHolder(); 
      viewHolder.tvSendTime = (TextView) convertView 
          .findViewById(R.id.tv_sendtime); 
      viewHolder.tvUserName = (TextView) convertView 
          .findViewById(R.id.tv_username); 
      viewHolder.tvContent = (TextView) convertView 
          .findViewById(R.id.tv_chatcontent); 
      viewHolder.tvTime = (TextView) convertView 
          .findViewById(R.id.tv_time); 
      viewHolder.isComMsg = isComMsg; 
 
      convertView.setTag(viewHolder); 
    } else { 
      viewHolder = (ViewHolder) convertView.getTag(); 
    } 
 
    viewHolder.tvSendTime.setText(entity.getDate()); 
     
    if (entity.getText().contains(".amr")) { 
      viewHolder.tvContent.setText(""); 
      viewHolder.tvContent.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.chatto_voice_playing, 0); 
      viewHolder.tvTime.setText(entity.getTime()); 
    } else { 
      viewHolder.tvContent.setText(entity.getText());      
      viewHolder.tvContent.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0); 
      viewHolder.tvTime.setText(""); 
    } 
    viewHolder.tvContent.setOnClickListener(new OnClickListener() { 
       
      public void onClick(View v) { 
        if (entity.getText().contains(".amr")) { 
          playMusic(android.os.Environment.getExternalStorageDirectory()+"/"+entity.getText()) ; 
        } 
      } 
    }); 
    viewHolder.tvUserName.setText(entity.getName()); 
     
    return convertView; 
  } 
 
  static class ViewHolder { 
    public TextView tvSendTime; 
    public TextView tvUserName; 
    public TextView tvContent; 
    public TextView tvTime; 
    public boolean isComMsg = true; 
  } 
 
  /** 
   * @Description 
   * @param name 
   */ 
  private void playMusic(String name) { 
    try { 
      if (mMediaPlayer.isPlaying()) { 
        mMediaPlayer.stop(); 
      } 
      mMediaPlayer.reset(); 
      mMediaPlayer.setDataSource(name); 
      mMediaPlayer.prepare(); 
      mMediaPlayer.start(); 
      mMediaPlayer.setOnCompletionListener(new OnCompletionListener() { 
        public void onCompletion(MediaPlayer mp) { 
 
        } 
      }); 
 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
 
  } 
 
  private void stop() { 
 
  } 
 
}

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